20018474 has 16 divisors (see below), whose sum is σ = 34427328. Its totient is φ = 8551872.

The previous prime is 20018459. The next prime is 20018477. The reversal of 20018474 is 47481002.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20018477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2597 + ... + 6839.

It is an arithmetic number, because the mean of its divisors is an integer number (2151708).

Almost surely, 2^20018474 is an apocalyptic number.

20018474 is a deficient number, since it is larger than the sum of its proper divisors (14408854).

20018474 is a wasteful number, since it uses less digits than its factorization.

20018474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4589.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 20018474 is about 4474.2009342451. The cubic root of 20018474 is about 271.5253128578.

Adding to 20018474 its reverse (47481002), we get a palindrome (67499476).

The spelling of 20018474 in words is "twenty million, eighteen thousand, four hundred seventy-four".